The battery fits in a little too tight, but still acceptable. The first charge took approximately 6 hours. Turning off the phone, and lo and behold it works again. Since my son is still occasional users (only erreicher), the phone keeps in standby before 6-8 days. The battery care function (fully discharged) works without problems. The only thing I noticed is that proceeds the phone after charging completely, and the Ladegreät is a little hot. Of course you can hang together so that there is no original Siemens battery.
But all in one: I am satisfied. And beat at the price.